Erin and Anthony trust a sociopath who claims he has evidence to convict a murderer; Frank faces backlash from his department when he suspends an officer for violent behavior; Danny and Baez try to arrest a notorious gangster.

Jamie faces backlash from fellow officers when he partners with Erin and Anthony to investigate an underground bar the NYPD and FDNY use to hide their criminal indiscretions; Eddie's partner considers leaving the force.